Freenet

Freenet <https://freenetproject.org/> is a free open source community project to provide a un-censorable distributed database that can be interacted with in various way.
Some of the most popular applications running on Freenet at-the-moment include:
FProxy, an internet like system where you can browse ‘freesites’ using a standard web browser).
FMS, (free messaging service), software that allows for mailing style forums.
Freetalk, next generation web-of-trust based messaging and forum software.

The bitcoin community is working on a developing bitcoin-on-freenet, this project has the goals of being able to fully interact with bitcoin anonymously through freenet, potentially creating a darknet of bitcoin users.

BtcFn Project

The BtcFn Project is a project of porting the Bitcoin transport layer to Freenet, more information can be found at:
USK@oG7cGoUEBuHyulWpcmqV0yc-I569Re2A7RRs8zRljEs,IWIcXczmLdP9FEjTvoxJgGnXnK5~PxOppN-wYSADPWQ,AQACAAE/bitcoin-over-freenet/1/